Spatiotemporal distribution and fishing ground driving mechanism of swimming crab Portunus trituberculatus in Hangzhou Bay and its adjacent waters.

Seasonal variation and bottom salinity ( P < 0.001) exerted highly significant effects on abundance, with latitude and surface chlorophyll a ( P < 0.05) content, P. trituberculatus abundance initially increased slowly, before accelerating as the chlorophyll a concentrations increased.

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